Floor grating



March 11, 1930. H. H. BUNKER 1,749,902

FLOOR GRATING Filed April 4, 1929 FIG. I.

FIG. 2.-

construction as to render it Patented Mar. 11, 1930 UNITED STATES PATENT OFFICE HERBERT H. BUNKER, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO KERLOW STEEL FLOOR COMPANY, OF JERSEY CITY, .NEW JERSEY, A CORPORATION OF NEW JERSEY noon GRATING Application filed April 4,

This invention relates to steel floor gratings of the type which is made up in units of longitudinally disposed bars or girders separated and secured together by spacing memhere.

Among the objects of this invention is to produce a floor grating'of a design which Wlll possess the requisite amount of strength and yet be so characterized by its simphcity of capable of being manufactured at low cost.

Another objectof the invention is to provide a design of floor grating requiring metallic members of but two shapes and but one working operation to unite one girder or bar with two spacing members.

The principle embodied in my inventlon includes the use of girders of any usual type, such as strai ht bars, and spacing members designed so that a spacing member engages the two girders at its ends and also engages the spacing memberson the other sides of the two engaged girders. The form of grating herein illustrated includes straight bars and spacing members of angular shape, the end of one leg of the angular spacing member hav ing shoulders and a projection or lug by which it engages a hole in a girder and a hole in a leg of another spacing member on the other side of the girder. When in position' the exposed end of the pro ection may be headed over so as to form a locking connection of two spacing members and a girder. The width of a grating'may be added to by the addition of other girders and spacing members, it being necessary to head the proj ections extending in one direction only. The details of this invention are illustrated in the accompanying sheet of, drawings in which Fig. 1 is a plan of a simplified form of a unit of a floor grating.

Fig. 2 is a section on line 22 of Fig. 1. Fig. 3 is a perspectiveview of a spacing member.

- Fig. 4: is a perspective view of a girder.

As is customary in floor gratings a number of girders or bars and spacing members 11 are assembled together in a unitof specified dimensions which depend upon convenience,

1929. Serial No. 352,443.

intended use and strength of the elements used in the construction. 1

In the present form of the invention straight bars constitute the girders and since these are designed so as to be able to carry all of the vertical load they are so positioned that their narrow dimensions may rest upon supporting structure, not shown. The girders run lengthwise of the grating and are generally spaced laterally from each other and parallel to each other.

The spacing members 11 serve primarily to maintain the girders of a unit in definite relation to each other and their upper edges lie in the same plane as the upper edges of the girder 10 so as to define the walking surface of the floor grating and at the same time prevent slipping in a direction lengthwise of the grating. In addition, the present type of spacing members contributes materially to the transverse strength of the floor grating.

As clearly seen in Fig. 3, each spacing member 11 is angularly shaped. One leg 12 has a hole 13 running parallel to the line of fold or' the heel and the other leg 14 has shoulders 15, 16 spaced from the surface 17, a distance equal to the intended spaced relation of the girders 10. A projection or lug 1'8 extends in prolongation of leg 14. As is apparent, these spacing members may be made from sheet material or angle iron properly sheared and punched.

It is clear that in order to assemble a grating in accordance with the principle of my invention it is necessary to have at hand only two kinds of pieces, whatever their forms may be, the girders and the spacing members, and that these pieces may be already punched. The girders have a series of holes 19, Fig. 4, each of which is so dimensioned as to permit projection 18 to enter. If the arrangement of the spacing members 11 is to be otherwise than in rows perpendicular to the girders or similar to that shownin Fig. 1, the positions of the holes in the girders must be chosen to suit the arrangement desired.

In assembling the floor grating illustrated herein a workman would secure spacing members 11 to girder 10 by means of rivets 20, Fig. 1. Having assembled the first girder and its associated spacing members a second girder may be readily put in position by causing the projections 18 to engage the holes in the second girder. Assuming the specified arrangement to be that the rows of spacing.

protruding end of the projection isthen ham-1 mered over so as to firmly secure togetherthe two engaging spacingmembers and the gird- V ers therebetween. After each similar set of spacing members is secured together a'third girder is mounted in place and another longitudinal row of spacing members is placed thereagainst and permanently secured in the manner described in connection with the positioning of the second girder and the second longitudinal row of spacing members. By adding more girders and longitudinal rows of spacing members the width of the grating may be increased to any desired dimension.

It is apparent that in building the grating herein illustrated all of the girders 'may be similarly-punched and that it is only necessary t o turn every other one end for end when assembling the grating if it is desired that all of the girders finish in one'line square to the longitudinal direction of the grating.

I claim: 7 i

1. A'ifloor grating comprising a plurality of longitudinal girders and members laterally spacing the girders from each other, there being a plurality of lateral rows of spacing members with the successive spacing membersof each lateral row connected together, each of said spacing members having a projection engaging with a contiguous girder and the next succeeding spacing member in the same lateral row.

2. A floor grating comprising longitudinally extending girders and spacing members therebetween, said spacing members being arranged in rows with successive spacing members of each row connected together by a projection extending from one member and passing through an opening in a contiguous girder and engaging with an opening in the next spacing member in the same row on the other side of the contiguous girder.

3. A floor grating comprising-longitudinally extending girders and spacing members therebetween, each spacing member be ing in the form of an angle, one leg of the angle being contiguous a vertical surface of a girder with the otherleg of the angle extending toward the next girder, each spac ing member having a projection extending.

from the laterallyv disposed leg and an opening in the longitudinally disposed leg Where by to connect together a girder and another spacing member.

4:.A floor grating comprising longitudinally extending girders and spacing members 'therebetween, saidspacing members being in rows transverse'the girders, each in- 'termediate spacing member of each transverse .row serving in the connection of a pair of girders and two other spacing members said connection comprising a projection of one spacing member in association with a hole in another spacing member and a hole 1n the girder intermediate said two projectionand hole engaged spacing members.

5. A floor grating comprlsing a plurality 1' of longitudinal girders and spacing members therebetweeinthere being a plurality of 1011".

gitudinally spaced spacing'members between each pair of longitudinal g1rders, each spacing member having a leg thereof longitudinally disposed and contiguous one side of a girder and'another leg transversely disposed and extending to another girder, the two girders thus spaced from each'other being secured in permanent relation by the lock-.

ing together of the spacing member intermediate I the two girders with the spacing members on the other sides of the two girders. 6. A floor grating comprising spaced, girders and spacing members therebetween, each spacing member being in the form of an angle with a surface of one leg in contact with a surface of a girder and the other leg extending transversely of the grating, and a projection extending from the transversely disposed leg of the spacing member, said projection being adapted to pass through an opening in a girder and through an opening in the leg of another spacing member disposed on the other side of the spaced girder. I

7. -A floor grating comprising longitudinal girders and spacing members connecting together the girders, there being a plurality of individual spacing members between each pair of girders 'forming'transverse rows of spacing membersof which successive spac i r 115 l 7 ing members in a transverse row are connected together, each spacing member hav and asurface contiguous with the surface of another girder whereby the girders are maintained in spaced relation, and each spacing member being provided with a projection ing at least one shoulder abutting a girder v v other side of the girder having the hole there- 7 in and a hole for receiving and engaging with the projection ofv the spacing member on the other side of another girder.

In testimony whereof I. hereto affix my signature.

HERBERT n; BUNKER; 

